Download & Install
Save the file to your local computer. Depending on which browser you're using, you may have the option of choosing where your downloaded file should go, or it may automatically download to your "Downloads" folder.
(Detailed download instructions for various browsers are available in the PDF)

Alternatively... You can also install the Adobe Digital Editions App on your mobile device. Launch the app and follow the prompts to authorize yourself (similar to computer directions above).